Elemental MDX: MDX Time Series Functions: PeriodsToDate() and OpeningPeriod(), Pt. 1 In this three-part article, we will introduce the PeriodsToDate() and OpeningPeriod() time series functions, which we can exploit to perform analysis within the context of time. As we have discussed in other articles of the Elemental MDX series, many business requirements revolve around theperformance of analysis within the context…